Explain the contract responsibility system. What did it replace?

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.

uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs

answer; a cost benefit analysis;